52 lines
2.7 KiB
C
52 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/hefty/mkvarargv.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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/**
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* Executes program, with PATH search and current environment.
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*
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* The current process is replaced with the executed one.
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*
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* @param prog is program to launch (may be PATH searched)
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* @param arg[0] is the name of the program to run
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* @param arg[1,n-2] optionally specify program arguments
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* @param arg[n-1] is NULL
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* @return doesn't return on success, otherwise -1 w/ errno
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* @notasyncsignalsafe
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*/
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int execlp(const char *prog, const char *arg, ... /*, NULL*/) {
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char *exe;
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char pathbuf[PATH_MAX];
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if ((exe = commandv(prog, pathbuf))) {
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va_list va;
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void *argv;
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va_start(va, arg);
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if ((argv = mkvarargv(arg, va))) {
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execve(exe, argv, environ);
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free(argv);
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}
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va_end(va);
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}
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return -1;
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}
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